Thermal behavior of polyoxometalate Mo132

Abstract

Thermal destruction of (NH4)42[Mo 72 VI Mo 60 V O372(H3CCOO)30(H2O)72]30H3CCOONH4 · 250H2O, polyoxometalate Mo132, was analyzed. Differential scanning calorimetry (DSC) and mass spectrometry were investigative tools. Thermal destruction occurs in air and in nitrogen in three main stages. First, water is eliminated. The thermolysis products at higher temperatures include acetamide and acetonitrile. Molybdenum oxides are formed in solid products through an amorphous stage. The utility of NMR spectroscopy for analyzing poly(oxometalates) is demonstrated.